Journal of Jilin University(Engineering and Technology Edition) ›› 2022, Vol. 52 ›› Issue (12): 2964-2970.doi: 10.13229/j.cnki.jdxbgxb20211001

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Routing method for quantum key distribution networks based on bucket weight computation

Lin BI1,2(),Shuo FANG1,2,Xiao-qiang DI2,3   

  1. 1.School of Computer Science and Technology，Changchun University of Science and Technology，Changchun 130012，China
    2.Jilin Province Key Laboratory of Network and Information Security，Changchun University of Science and Technology，Changchun 130012，China
    3.Information Center，Changchun University of Science and Technology，Changchun 130012，China
  • Received:2021-10-03 Online:2022-12-01 Published:2022-12-08

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Abstract:

In the process of building a large-scale quantum key distribution network， a routing algorithm based on bucket weight calculation for quantum key distribution network is proposed to improve the success rate of key relaying in trusted relay mode， reduce the link key consumption and balance the network load， and a network architecture model based on software-defined network SDN is constructed. Among all the paths from the source node to the destination node， the controller selects the optimal path by calculating the Bucket weight， that is the bucket weight as the path priority. The simulation results show that the proposed routing method is reasonable and feasible.

Key words: quantum key distribution, routing algorithms, software defined network, bucket weight computation

CLC Number: 

  • TP393

Fig.1

QKDN network architecture model"

Fig.2

Schematic diagram of bucket weight"

Fig.3

Comparison of the three routing protocols"

Fig.4

Network topology"

Table 1

All paths from S1 to S9"

路径NodeXsdPCW（i）
S1 S5 S9328
S1 S5 S6 S7 S9546
S1 S5 S6 S3 S4 S8 S7 S9874
S1 S5 S6 S2 S3 S4 S8 S7 S9983
S1 S2 S6 S7 S9546
S1 S2 S6 S5 S9546
S1 S2 S6 S3 S4 S8 S7 S9874
S1 S2 S3 S6 S7 S9655
S1 S2 S3 S6 S5 S9655
S1 S2 S3 S4 S8 S7 S9765
S1 S2 S3 S4 S8 S7 S6 S5 S9983

Fig.5

RTT diagram of h1 communicating with h7"

Fig.6

Comparison chart of packet transmission rate in the maximum number of paths Max_Path"

Fig.7

Maximum number of paths Max_Path in the latency comparison chart"

Table 2

AODV protocol packet deliverability and qubit transmittance"

参数数值参数数值
发送比特量/qbits834 048发送数据包量/qbits1629
接收比特量/qbits833 536接收数据包量/qbits1628
量子比特传递率/%99.93数据包送达率/%99.93

Fig.8

Graph of the change in the amount of keys in the quantum key pool"

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